311420320 has 24 divisors (see below), whose sum is σ = 735730884. Its totient is φ = 124568064.

The previous prime is 311420287. The next prime is 311420321. The reversal of 311420320 is 23024113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 249766416 + 61653904 = 15804^2 + 7852^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 311420294 and 311420303.

It is not an unprimeable number, because it can be changed into a prime (311420321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973029 + ... + 973348.

Almost surely, 2^311420320 is an apocalyptic number.

It is an amenable number.

311420320 is an abundant number, since it is smaller than the sum of its proper divisors (424310564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311420320 is a wasteful number, since it uses less digits than its factorization.

311420320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946392 (or 1946384 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 311420320 is about 17647.1051450372. The cubic root of 311420320 is about 677.8219817289.

Adding to 311420320 its reverse (23024113), we get a palindrome (334444433).

The spelling of 311420320 in words is "three hundred eleven million, four hundred twenty thousand, three hundred twenty".